CVE-2025-68701: Jervis Package Suffers from Deterministic AES IV Derivation Vulnerability
Summary
CVE-2025-68701: Jervis has Deterministic AES IV Derivation from Passphrase. Affects net.gleske:jervis versions < 2.2. Fixed in 2.2. How to fix ↓
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Background
Jervis is an open-source automation tool designed to facilitate continuous integration and deployment processes. It leverages various technologies to streamline workflows and enhance productivity. However, it has been identified to have a security flaw related to its encryption mechanism, specifically concerning the deterministic generation of Initialization Vectors (IVs) when encrypting data with a passphrase.
Vulnerability Detail
The vulnerability arises from the deterministic nature of the AES IV derivation in the Jervis package. When the same passphrase is used with the same plaintext, it results in the same ciphertext due to IV reuse. This predictability significantly reduces the security of the encryption scheme, making it susceptible to pattern analysis and potential decryption by unauthorized parties. The impact is considered high for consumers directly using these methods, despite being classified as low for internal uses.
How To Fix
Latest published version: 2.4 as of 22 Oct 2026
Upgrading to it may include breaking changes; the version below is the minimum fixed release for this vulnerability.
If you need the minimum change
2.2
This is the first release that contains the fix.
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Workaround
There are no effective workarounds available for this vulnerability. The best course of action is to upgrade to the patched version of Jervis.
Conclusion
The Jervis package has a significant vulnerability related to deterministic AES IV derivation, which can lead to severe security risks. Users are strongly advised to upgrade to version 2.2 or later to ensure the integrity of their encryption processes. Regular monitoring for vulnerabilities using tools like Vulert can further enhance security.
See every vulnerability recorded for net.gleske:jervis →
FAQ
The vulnerability is related to deterministic AES IV derivation, leading to predictable ciphertext when the same passphrase and plaintext are used.
If your application uses Jervis for encryption, it may be at risk of data exposure due to the predictability of the encryption scheme.
The CVSS score for this vulnerability is 8.7, indicating a high level of severity, particularly for applications directly utilizing the affected methods.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. You can check your application using the Vulert playground without any signup.
While there are no workarounds, it is crucial to plan for an upgrade to mitigate the risk associated with this vulnerability.
References
Related vulnerabilities
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